Oil pump



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Yum-mu STATES PATENT OF taehed' drawing of which there is one sheet andin whichfigure i represents a transverse sectional view internalcombustion engine and oil represents a sectional view taken a planeindicated by the line 7-2 of Figure looking in the direction of thearrows;

8 represents a sectional view taken along indicatedbythelineHinl igureain the direction of the arrows; and represents a bottom plan view of afits between the motor block and i'igure 1 is a portion of an internalcombustion engine indicated generally at it and t ll. Extending from oneside of the cylinders it is a generally horizontal wall II in which areformed bosses II which are One of the walls 72 is forapurposewhichwilibeduorimd later. Theother wall 72 (the left wall umedinllllll'l)isprovidedwithabcss liaperturedatiltoreceivetheendoiadistributor a andms the distributor mm M.

ormsthsmctionlineofthewmpu."

U omrussr v smamsummmewmmumn m Ienesha, WE. a can poratiea of MarylandApplication August 19, 1.40. Serial No. 358,217 I v s Claims. (Ci. m-s)minventionrelatestooilpumpsandhas Securedinthelowerehdofhoiellisatube,partisahr reference to an oil pump adapted to II which extendsdownwardly to a screened be used on.an internal combustion engine.intake (not shown) in the oil pan". y It is an object of this inventionto provide The oil pump It consists of seating having forlubricating anoil pump shaft 5 a base I. from which extends the cylindricalbosstl(seel"igure1).Thebossllfitsintoa It 3' another object f thisinvention to prohole formed in the thickened portion ll 01' ride novelmeans for providing a relief passage the crank case wall If, forwardlyof the holes hunsno pump. andll'rhebossllisboredtoreceivethe Other 0 andadvantages of this invenl0 shaft 62 which drives the pump 3|. Below thethis will be apparent from a consideration of base II the casting isbored intwo parallel interthe follow! description and claims and theatsecting cylindrical holes 4 and it within which fit the mating gears Iand II. The casting is cut away at I! where the two cylindrical spacesintersect to form a discharge chamber and at 74 to form an intakechamber. The base It is cut away at II at the ends of the discharge andintake chambers to form pockets which are uncovered by each tooth of thegears I. and It as the gears revolve. The upper hole 44 in the thickenedportion 20 of the engine connects with a hole 77 in the base it whichopens into the pocket It at the end of discharge chamber 77 and thelower hole ll connects with a hole ll in the base it which opens intothe pocket I. in the end of the intake chamber 77.

The gear I. is retained on the lower end of the shaft '2 by means of asnap ring I. fitted in a groove in the en 01' the shaft 67 (see Figure3) and is fixed rotate with the shaft by a key 00 engaged in the keywayI! cut in the t a gear 10. The gcar. I is driven by the gear ll I andturns on jaril idler shaft 84 (see Figure 2) fixed in the base I of thepump casting.

The upper end of-shaft 62 carries the gear II which is fixed on theshaft by means of the pin 87. The hub of gear It bears on the uppersurface of the cylindrical boss It and keeps the shaft u from slidinglengthwise of the bore sill. The gear 86 mates with a spiral gear. filv.

the oil pump is cut in the camshaft I so that driven by th'eflc'amshaft.The distributor shaft It is slotted at its'lower end at M and fitswithin the gear ll where the 1 upper end of the pump shaft 77 isprovided with I" and Ill. When the gasket is in place be tween the pumpand motor block, the slot ll. formsametering'passage through whichoil'is bled from the discharge to the annular space Ill formed by reducingthe diameter of the cylindrical boss I! at III. From the annular spaceIll oil flows through a hole ii. in the boss ll to'a second annularspace Ill formed by reducing the diameter of the shaft 62 at ill. Oilfrom the annular spacelll creeps along the shaft 82 to lubricate theshaft and also passes up the spiral groove if. out in the shaft 82.

As the shaft II. revolves, the spiral groove ill uncovers orcommunicates with the hole III drilled in the upper end of thecylindrical boss ll. Hole I22 directs a jet of oil upwardly against thecam shaft gear I. and acts as a relief hole to return a portion of theoil in the annular space Ill to the oil pan 84. Gears" and II are thuspositively lubricated at every revolution of the shaft 82.

The lower face of the pump 38 is machined flat at Ill and is closed by aplate I" which is secured to the pump by the screws ll. Plate III isrecessed at Ill (see Figure 1) to clear the end of the shaft 61. a V

The construction of the pump assures I adequate lubrication of the pumpshaft and thegears l6 and ll. The oil is constantly circulated underpump pressure and the amount circulated is automatically regulatedaccording to the pump speed by the metering slot III in the gasket ll.

While I have described my invention in some detail, I intend thisdescription to be an example only and not as a limitation of myinvention to which I make the following claims:

1. In combination with an internal combustion engine having a walldefining an aperture, a pump body having a hollow cylindrical bossextending therefrom and extending'through said aperture, a pump shaftjournaled in said boss. a gear secured to said shaft and bearing on theV -end of, said boss, means for conducting oil from the-discharge sideof said pump along said shaft to within said boss, a groove cut in saidshaft, the end of said boss defining an aperture arranged to communicatewith said groove at each revolution of said shaft, and a driving geararranged to drive the gear on said shaft, the aperture in the end ofsaid boss being arranged to space, the end of said boss defining anaperture between the surface of said boss and said shaft, a groove cutin said shaft and arranged to comassure-z mar-m5 ranged to communicatebetween spaceandtheaperturesintheendofsaid at each revolution of saidshaft. and gears for driving said shaft. said apertures being arrangedtodirectietsofoilagainstsaidgearsandinto engine having a wall definingan aperture,

pump body having a hollow cylindrical boss formed thereon and extendingthrough said aperture. a shaft for driving said pump Journaled in saidhollow boss. said shaft having a portion of its length within said bossreduced in diameter so as to form an annular space, means for conductingoil from said pu'mp tosaid annular space, a spiral groove cut in saidshaft and communicating with said annular space. the end of saidboss-defining apertures arranged to be successively uncovered by saidgroove as said shaft is rotated, and gears for driving said shaft, saidgears being positioned so as to be in the path of oil discharged throughone of the apertures in the end of said boa.

5. In combination with an internal combustion engine having a walldefining an aperture,"

' arranged to drive said shaft.

6. In combination with an internal combustion engine having a walldefining an aperture, an oil pump having a body with a hollowcylindrical boss formed on one side thereof and extending through saidaperture, intake and discharge passages for said pump formed in saidwall, a gasket positioned'between said wall and the body of said pump,said gasket defining a metering slot between the discharge passage ofsaid pump and the space between said wall and said boss, a shaftiournaled in said boss,a passage formed between the inside of said bossand said shaft, said passage communicating with the space between saidwall and said boss, gears for driving said shaft, and jets formed in theend of said boss and arranged to direct a jet of oil against said gears.

7. In combination with an internal combustion engine having a walldefining an aperture, a pump body having a hollow cylindrical bossextending through said aperture, a pump shaft Journaled in said boss. agear secured to said shaft and bearing on the end of said boss, meansforconducting oil from the discharge side of said pump along said wallto within saidboss, a spiral groove cut in said shaft, the end ofsaid-boss defining an aperture arranged to communicate with said grooveat each revolution of said shaft. and a driving gear arranged to drivethe gear on said shaft, the aperture in the end of said bossHagarrangedtodlrectaietoioilagainstsaid dliving gear.

i t. In combination with an internal combustion mine. on oil pumpsupported on said engine, a shaft for driving said pump journaled in apor- Inn of said pump, said last mentioned portion tending through awall of said engine, said Quit having a portion'oi its length reduced indiameter within said journal to form an annular space, means fordelivering oil from said pump to said annular space, a groove cut insaid shaft within said journal and connecting with said annular space,the end of said journal defining apertures arranged to be uncovered bysaid groove as said shaft revolves, and gears arranged to drive saidshaft, one of said apertures being arranged to direct a jet of oilagainst said gears.

JOSEPH F. SLADKY.

